It was the movie that firmly established that jedi were the only characters who make any real difference…han and leia had zero stake or importance in the story and you can cut then out if you want…this trend of “jedi first, everyone last” infected star wars media to a ridiculous degree
Han and Leia (et al) took down the Death Star’s shields so that Lando and Wedge (also, non-Jedi…) could then blow up said Death Star which (even if Luke had totally failed) would have killed the Emperor…But, no, you’re right.